From 77435b7c2093f78092431fadf87385305e2e41ea Mon Sep 17 00:00:00 2001
From: Josh Deprez <DrJosh9000@users.noreply.github.com>
Date: Wed, 1 Sep 2021 09:52:40 +1000
Subject: [PATCH] interface

---
 engine/billboard.go | 1 +
 engine/walls.go     | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/engine/billboard.go b/engine/billboard.go
index 7e0e5f5..02d9791 100644
--- a/engine/billboard.go
+++ b/engine/billboard.go
@@ -13,6 +13,7 @@ var _ interface {
 	Drawer
 	ParallaxScaler
 	Scanner
+	Transformer
 } = &Billboard{}
 
 func init() {
diff --git a/engine/walls.go b/engine/walls.go
index 7c7cb4c..4a1ec51 100644
--- a/engine/walls.go
+++ b/engine/walls.go
@@ -18,6 +18,8 @@ var (
 		Disabler
 		Hider
 		Prepper
+		Scanner
+		Transformer
 	} = &WallUnit{}
 )